Photogrammetric space intersection requires image coordinates of a point in space to be digitized on two or more photos. In digital photogrammetry or in single photo digitizing, it is difficult to locate the matching image of poorly defined point

对碰撞检测和视锥的可视性检查非常有用的C程序。非常有效和快速。-"C" implementation of an extremely fast and robust polygon-cube intersection test by Don Hatch and myself as published in Graphics Gems V. Very useful for collision detection and view frustum visibility checking.

Reaching the ground coordinates using the coordinates of the photogrammetric